Shugo Chara!! Doki

After Kairi returns to the countryside, the J seat in Guardians is left vacant. During these peaceful days, Easter is planning how to seize the Embryo. At this time, they invite a girl named Riru, who has the ability to create gemstone necklaces. Anyone who wears one will have their Heart's Egg turn into a X Egg. Out-of-control X Eggs not only trigger Character Transformation but also force Guardian Change. Meanwhile, the Humpty Lock seems to have gained new abilities... And Nadeshiko has returned from abroad! She appears before everyone in her male form, revealing her real name as Fujisaki Nagihiko. The first-generation K invites Nagihiko to take on the J seat. Initially refusing, Nagihiko eventually agrees to become the J seat of the Guardians due to Amu's dazzling offensive (or so it seems).